From the basic energy conservation considerations, it is clear how much heat is produced by the AC - the same amount that it consumes from the power grid. There is no other place that energy can go to, and there's no additional energy that can be converted to heat. So if your AC consumed 1kWh, that's 1kWh of heat that was dissipated. It doesn't matter what's inside the AC, conservation of energy works the same way. BTW the same would be true for any device that consumes 1kWh, unless it creates mass (very uncommon for household devices).